<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
        <style type="text/css">
            * {
                margin 0 padding 0
            }
        </style>
    </head>
    <body onload=test()>
        <script>
            function test() {
                console.log('===')
                alert("hello")
            }
        </script>
    </body>
